The Mariners announced that they have designated outfielder Travis Witherspoon for assignment to clear a roster spot for Corey Hart, whose signing is now official.
Seattle claimed the 24-year-old Witherspoon off waivers from the Angels back in early October. Once thought to be a high upside prospect for the Halos. However, he battled through health issues in 2012 and suffered a down year at the plate in Double-A this past season, hitting .214/.299/.342 in 129 games.